Results 21 to 30 of about 1,120,417 (313)
Geometrical optics of constrained Brownian motion: three short stories [PDF]
Journal of Physics A: Mathematical and Theoretical, 2019 The optimal fluctuation method—essentially geometrical optics—gives a deep insight into large deviations of Brownian motion. Here we illustrate this point by telling three short stories about Brownian motions, ‘pushed’ into a large-deviation regime by ...
B. Meerson, Naftali R. Smith
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Компьютерная оптика, 2022 We develop a method for calculating the eikonal function (or the phase function) of the light field, ensuring the formation of a prescribed irradiance distribution in the geometrical optics approximation.
L.L. Doskolovich +4 more
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Geometrical optics for scalar, electromagnetic and gravitational waves on curved spacetime [PDF]
International Journal of Modern Physics D, 2018 The geometrical-optics expansion reduces the problem of solving wave equations to one of the solving transport equations along rays. Here, we consider scalar, electromagnetic and gravitational waves propagating on a curved spacetime in general relativity.
S. Dolan
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The singularities of light: intensity, phase, polarisation
Light: Science & Applications, 2023 In modern optics, light can be described at different levels: as rays, as scalar waves, as vector fields, and as quantum fields. In the first three levels, there are singularities—characteristic features, useful in interpreting phenomena at that level ...
Michael V. Berry
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X-ray propagation through a kinoform lens
Journal of Synchrotron Radiation, 2022 Combining geometric ray tracing and wave optics propagation, a new simulation model named LWF is established to calculate the full coherent X-ray propagation through a kinoform lens. The LWF model is used to analyze the X-ray propagation through long and
Weihong Sun +6 more
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Two approaches to the problem of ray seismic tomography
Геофизический журнал, 2015 Approximation of nonlinear geophysical medium as a linear one substantiates a transition to geometrical seismics based on geometric optics. Conditions, necessary and sufficient for application of geometrical optics bring possibility of linearization ...
T.A. Tsvetkova
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Journal of Synchrotron Radiation, 2022 A new algorithm to perform coherent mode decomposition of undulator radiation is proposed. It is based on separating the horizontal and vertical directions, reducing the problem by working with one-dimension wavefronts.
Manuel Sanchez del Rio +4 more
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Freeform geometrical optics I: principles. [PDF]
Applied Optics, 2019 Lens design uses a calculation of the lens' surfaces that permits us to obtain an image from a given object. A set of general rules and laws permits us to calculate the essential points of the optical system, such as distances, thickness, pupils, and ...
J. Valencia-Estrada +1 more
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Invisibility cloaking based on geometrical optics for visible light [PDF]
Journal of the European Optical Society-Rapid Publications, 2013 Optical cloaking has been one of unattainable dreams and just a subject in fiction until recently. Several different approaches to cloaking have been proposed and demonstrated: stealth technology, active camouflage and transformation optics. The last one
Ichikawa H., Oura M., Taoda T.
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Bessel Beam Diffraction by an Aperture in an Opaque Screen
International Journal of Optics, 2015 The scattering of the Bessel beam by a circular aperture in an opaque screen is investigated by the geometrical theory of diffraction approach. The geometrical optics and diffracted and scattered fields are obtained.
Husnu Deniz Basdemir
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